Why's the Space Needle Red?

It was all dark and red. It was a little creepy to see it barely lit. Now I'm all curious and the Space Needle and Seattle Center sites aren't helping.

Too early for Valentines, and it's not the color of any local sports teams that I can think of. I know there's probably a decent size group of people around here thinking that they like Ron Paul, but I doubt they'd do up the Needle in Republican Red for him coming to town.